body {
    background: #313131;

}

.font{
    font-size: 20px;
    text-shadow: none;
    outline: none;
    color:grey;
    text-align: center;
    margin-top: 35%;
    font-family: 楷体;
}

.btn{
   width: 220px; 
    height: 35px;
    margin-top: 5%;
    margin-left: 15%;
    border-radius: 7px;
    border:1px solid #313131;
    background-color: grey;
    outline: none;
    font-family: 楷体;
    font-size:13px !important;
}

.btn:active{
    background-color: #ffcf01;
}